PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-18:42:50
G02     55.4           36.6                8.2 +/-    1.96      12.7 +/-    1.96  0.180 / 0.550
G05     63.7           64.4                8.6 +/-    0.55       9.4 +/-    0.55  0.160 / 0.440
G12     184.9          36.5               10.3 +/-    1.14      16.0 +/-    1.14  0.300 / 0.280
G13     129.1          12.9               12.2 +/-    5.19      31.9 +/-    5.19  0.260 / 0.350
G15     165.7          10.0               -9.0 +/-    8.30     -25.2 +/-    8.30  0.110 / 0.260
G21     268.9          14.5               10.0 +/-    2.96      25.2 +/-    2.96  0.050 / 0.090
G25     243.0          54.1                9.3 +/-    2.51      11.2 +/-    2.51  0.070 / 0.060
G29     326.7          51.6                8.6 +/-    1.26      10.6 +/-    1.26  0.050 / 0.050